MLAB
Mesa Laboratories Inc /Co/One customer — 20% of revenue (fiscal 2026)
“In our Clinical Genomics division, a significant portion of revenues is generated from ongoing purchases by a relatively small number of established customers, with a single customer accounting for approximately 20% of the division's revenues in fiscal 2026.”
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.
Insider Sentiment Score
Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-06-22 | Archbold Brian David |
SVP Operations |
Sell↓
|
Common Stock
|
2,516 |
| 2026-06-22 | Sakys John |
CFO |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b5-1 plan. |
Common Stock
|
2,827 |
| 2026-06-22 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b-1 plan. |
Common Stock
|
442 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
233 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock Not Applicable RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates |
Restricted Stock Units - 8
|
2,480 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Units - 3 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 19, 2025 and each of the next 2 anniversary dates Not Applicable |
Restricted Stock Units - 3
|
368 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
125 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 7 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 7
|
844 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Units - 2 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 18, 2025 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 2
|
233 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
2,480 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
1,859 |
| 2026-06-18 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
1,036 |
| 2026-06-18 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units - 7 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock. RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates Not Applicable |
Restricted Stock Units - 7
|
2,756 |
| 2026-06-18 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units - 6 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock. RSUs that vested June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 6
|
1,036 |
| 2026-06-18 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
2,756 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
844 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Unit - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested 1/3 on June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Unit - 1
|
125 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
368 |
| 2026-06-18 | Sakys John |
CFO |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
2,282 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
263 |
| 2026-06-16 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes due on RSU which vested on June 15, 2026 |
Common Stock
|
118 |
| 2026-06-16 | Archbold Brian David |
SVP Operations |
Sell↓
|
Common Stock
|
1,151 |
| 2026-06-16 | Sakys John |
CFO |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs on June 15, 2026 |
Common Stock
|
1,223 |
| 2026-06-15 | Sakys John |
CFO |
Award↑
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8, 2029 Not Applicable |
Restricted Stock Units - 9
|
8,416 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Expiration↓
Filing footnotes — Non Qualified Stock Options (Direct)
NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date |
Non Qualified Stock Options
|
1,780 |
| 2026-06-15 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
2,717 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
2,454 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 9
|
2,454 |
| 2026-06-15 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units 8
|
2,717 |
| 2026-06-15 | Sakys John |
CFO |
Expiration↓
Filing footnotes — Non Qualified Stock Option (Direct)
NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date |
Non Qualified Stock Option
|
3,951 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Award↑
Filing footnotes — Restricted Stock Units - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8 2029 Not Applicable |
Restricted Stock Units - 10
|
4,328 |
| 2026-04-14 | Kadia Siddhartha |
President and CEO |
Award↑
Filing footnotes — Restricted Stock Units - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on each anniversary date Not Applicable |
Restricted Stock Units - 1
|
35,236 |
| 2026-04-14 | Kadia Siddhartha |
President and CEO |
Award↑
Filing footnotes — Restricted Stock Units - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on each anniversary date Not Applicable |
Restricted Stock Units - 1
|
34,807 |
| 2026-04-13 | Kadia Siddhartha |
President and CEO |
Other↑
|
No Securities Owned
|
0 |
| 2026-03-31 | Owens Gary M |
President and CEO |
Other↓
Filing footnotes — Restricted Stock Unit - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock Forfeited shares were due to vest on June 15, 2028. Shares were deemed expired on March 31, 2026 |
Restricted Stock Unit - 10
|
8,211 |
| 2026-03-10 | Capone Mark Christopher |
Director |
Buy↑
|
Common Stock
|
1,301 |
| 2026-03-10 | Tripeny R Tony |
Director |
Buy↑
|
Common Stock
|
1,315 |
| 2026-03-10 | Ladiwala Shiraz Shabanali |
Director |
Buy↑
|
Common Stock
|
3,500 |
| 2025-12-02 | Sullivan John James |
Director |
Gift↓
|
Common Stock
|
2,000 |
| 2025-10-27 | Owens Gary M |
President and CEO |
Convert↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs release of performance share units that were issued on October 28,2021 as a special grant to encourage continued performance and long-term retention. The PSUs vest 1/3 on October 27, 2024 and each of the next two anniversary dates. |
Common Stock
|
11,558 |
| 2025-08-15 | Sullivan John James |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2025 Not Applicable |
Restricted Stock Units - 9
|
1,404 |
| 2025-08-15 | Tripeny R Tony |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 3 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2025 Not Applicable |
Restricted Stock Units - 3
|
1,404 |
| 2025-08-15 | Sullivan John James |
Director |
Award↑
Filing footnotes — Restricted Stock Units - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest on August 15, 2026 Not Applicable |
Restricted Stock Units - 10
|
2,784 |
| 2025-08-15 | Capone Mark Christopher |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 2 (Direct)
Each RSU represents a contingent right to receive on share of the Issuer's common stock RSUs that vested on August 15, 2025 Not Applicable |
Restricted Stock Units - 2
|
1,404 |
| 2025-08-15 | Sullivan John James |
Director |
Convert↑
|
Common Stock
|
1,404 |
| 2025-08-15 | Ladiwala Shiraz Shabanali |
Director |
Convert↑
|
Common Stock
|
1,949 |
| 2025-08-15 | Hall Shannon |
Director |
Award↑
Filing footnotes — Restricted Stock Units - 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest on August 15, 2026 Not Applicable |
Restricted Stock Units - 8
|
2,784 |
| 2025-08-15 | Alltoft Jennifer Sadie |
Director |
Convert↑
|
Common Stock
|
1,404 |
| 2025-08-15 | Alltoft Jennifer Sadie |
Director |
Award↑
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest on August 15, 2026 Not Applicable |
Restricted Stock Units - 9
|
2,784 |
| 2025-08-15 | Hall Shannon |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 7 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2025 Not Applicable |
Restricted Stock Units - 7
|
1,404 |